The DroneKeeper Mini is such a simple idea, and yet it's brilliant. In it's simplest form, it's a beeper with it's own battery that starts to beep when there's no movement for more than 30 seconds.
You can get them from NicheTek here -
I took it out for an in-depth test - I didn't have any lipo situation where the lipo ejected this time, but I dumped the quad down in long grass that would have been very challenging to find without any alarm system.
It's easy to stick on a lipo, so I'll be using these as another level of protection against losing my models. I think they'll also come in very hand with the small planes I tend to fly
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